.container {
  width: 80%;
  margin: 0 auto;
}

header {
  background: #4CAF50;
  color: white;
  padding: 10px 0;
  text-align: center;
}

h1, h2, h3 {
  font-family: 'Arial', sans-serif;
}

nav {
  background: #333;
  color: white;
  padding: 10px;
}

nav a {
  color: white;
  margin: 0 15px;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 10px 0;
  position: relative;
  bottom: 0;
  width: 100%;
}

.card {
  border: 1px solid #ccc;
  border-radius: 5px;
  padding: 15px;
  margin-bottom: 20px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.button {
  background: #4CAF50;
  color: white;
  padding: 10px 15px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

.button:hover {
  background: #45a049;
}